#66BDF9#66BDF9

#66BDF9 is a light, vivid cyan. Relative luminance 0.461; OKLCH L 76.8% C 0.121 H 240.9°. Best body text is #000000 at 10.21:1 contrast (WCAG AA passes).

Color values

HEX	#66BDF9
RGB	rgb(102, 189, 249)
HSL	hsl(204, 92%, 69%)
HSV	hsv(204, 59%, 98%)
CMYK	cmyk(59%, 24.1%, 0%, 2.4%)
CIE-LAB	lab(73.58, -9.05, -37.56)
CIE-LCH	lch(73.58, 38.63, 256.46°)
OKLab	oklab(76.8% -0.0587 -0.1053)
OKLCH	oklch(76.8% 0.121 240.9)
XYZ	xyz(40.7696, 46.0557, 96.3453)
Luminance	0.4606 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BDF9 #F9A266

analogous

#66F9EC #66BDF9 #6674F9

triadic

#66BDF9 #F966BD #BDF966

tetradic

#66BDF9 #EC66F9 #F9A266 #74F966

square

#66BDF9 #EC66F9 #F9A266 #74F966

split-complementary

#66BDF9 #F96674 #F9EC66

monochromatic

#0986DC #2BA4F7 #66BDF9 #A1D6FB #DCF0FE

Accessibility & contrast

On white

2.06

#66BDF9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.21

#66BDF9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BDF9

10.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BDF9	#FFFFFF	#000000	##000000
##66BDF9	1.00	2.06	10.21	10.21
#FFFFFF	2.06	1.00	21.00	21.00
#000000	10.21	21.00	1.00	1.00
##000000	10.21	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A2BDFC

Deuteranopia (green-blind)

#8EAEF8

Tritanopia (blue-blind)

#00CCD1

Achromatopsia (no color)

#B5B5B5

Design tokens & code

CSS

--color: #66bdf9;
/* rgb */ color: rgb(102, 189, 249);
/* oklch */ color: oklch(76.8% 0.121 240.9);

Tailwind

colors: {
  custom: {
    50: '#9dd0fb',
    500: '#66bdf9',
    950: '#000000',
  },
}

SCSS

$custom: #66bdf9;
$custom-light: #9dd0fb;
$custom-dark: #000000;

JSON

{
  "hex": "#66bdf9",
  "rgb": {
    "r": 102,
    "g": 189,
    "b": 249
  },
  "hsl": {
    "h": 204.49,
    "s": 92.453,
    "l": 68.824
  },
  "oklch": {
    "l": 0.76803,
    "c": 0.12057,
    "h": 240.9
  },
  "luminance": 0.4606
}

Semantic roles & 50–950 ramp

primary

#66BDF9

secondary

#F3D9C8

accent

#5E00E6

background

#FAFCFF

surface

#F4F9FF

border

#CED2D7

text

#0F1417

muted

#7F8285

Preview Lab

Preview with #66BDF9

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →